All of the third graders at Roth Elementary School were
All of the third graders at Roth Elementary School were given a physical-fitness strength test. The following data resulted:
a. Construct a dotplot.
b. Prepare a grouped frequency distribution using classes 1–4, 4–7, and so on, and draw a histogram of the distribution.
c. Prepare a grouped frequency distribution using classes 0–3, 3–6, 6–9, and so on, and draw a histogram of the distribution.
d. Prepare a grouped frequency distribution using class boundaries _2.5, 2.5, 7.5, 12.5, and so on, and draw a histogram of the distribution.
e. Prepare a grouped frequency distribution using classes of your choice, and draw a histogram of the distribution.
f. Describe the shape of the histograms found in parts b–e separately. Relate the distribution seen in the histogram to the distribution seen in the dotplot.
g. Discuss how the number of classes used and the choice of class boundaries used affect the appearance of the resulting histogram.
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